Department of Defence

Ionic liquids (ILs) are widely studied as a safer alternative electrolyte for lithium-ion batteries. The properties of IL electrolytes compared to conventional electrolytes make them more thermally stable, but they also have poor wetting with commercial separators. In a lithium-ion battery, the electrolyte should completely wet out the separator and electrodes to reduce the cell internal resistance. Investigations of cell materials with IL electrolytes have shown that the wetting issues in IL-electrolyte cells are most likely due to poor separator compatibility, not electrode compatibility. A compatible separator must be developed before IL electrolytes can be used in commercial lithium-ion batteries. Herein, separators for IL electrolytes, including commercial and novel separators, are reviewed. Separators with different processing methods, polymers, additives, and different IL electrolytes are considered. Collated, the separator studies show a strong correlation between ionic conductivity and membrane porosity, even more than the electrolyte type. The challenge of a suitable separator for IL electrolytes is not solved yet. Herein, it is revealed that a separator for IL electrolytes will most likely require a combination of high thermal and mechanical stability polymer, ceramic additives, and an optimized manufacturing process.

In order to improve the efficiency of the carbon dioxide cycling process and to reduce amine emissions, a series of nonvolatile amino acid salts with sterically hindered amine groups were investigated to determine their potential as direct replacements for monoethanolamine (MEA) in submarine-based CO2 scrubbers. Absorption from atmospheres containing various levels of CO2 was measured to assess the total capacities and absorption rates of amine solutions. The regeneration rates and extent of CO2 desorption were established by heating these solutions. 13C NMR spectroscopy was used to establish reaction products and solution compositions after both absorption and desorption. Methyl groups substituted adjacent to the amine were found to increase solution absorption capacities but with an overall reduction in absorption rate. Poor absorption rates at low CO2 levels and precipitation problems would prevent the α-dimethylamines examined from being used in existing submarine scrubbers. These amines, however, show potential as replacements in industrial CO2 scrubbing processes.

The solution of the steady-state Navier–Stokes equations in three dimensions has been obtained by a numerical method for the problem of natural convection in a rectangular cavity as a result of differential side heating. In the past, this problem has generally been treated as though it were two-dimensional. The solutions explore the three-dimensional motion generated by the presence of no-slip adiabatic end walls. For Ra = 10 4 , the three-dimensional motion is shown to be the result of the inertial interaction of the rotating flow with the stationary walls together with a contribution arising from buoyancy forces generated by longitudinal temperature gradients. The inertial effect is inversely dependent on the Prandtl number, whereas the thermal effect is nearly constant. For higher values of Ra , multiple longitudinal flows develop which are a delicate function of Ra, Pr and the cavity aspect ratios.

PURPOSE: Although anatomic segmentectomy has been considered a compromised procedure by many surgeons, recent retrospective, single-institution series have demonstrated tumor recurrence and patient survival rates that approximate those achieved by lobectomy. The primary objective of this study was to use propensity score matching to compare outcomes after these anatomic resection approaches for stage I non-small-cell lung cancer. PATIENTS AND METHODS: A retrospective data set including 392 segmentectomy patients and 800 lobectomy patients was used to identify matched segmentectomy and lobectomy cohorts (n = 312 patients per group) using a propensity score matching algorithm that accounted for confounding effects of preoperative patient variables. Primary outcome variables included freedom from recurrence and overall survival. Factors affecting survival were assessed by Cox regression analysis and Kaplan-Meier estimates. RESULTS: Perioperative mortality was 1.2% in the segmentectomy group and 2.5% in the lobectomy group (P = .38). At a mean follow-up of 5.4 years, comparing segmentectomy with lobectomy, no differences were noted in locoregional (5.5% v 5.1%, respectively; P = 1.00), distant (14.8% v 11.6%, respectively; P = .29), or overall recurrence rates (20.2% v 16.7%, respectively; P = .30). Furthermore, when comparing segmentectomy with lobectomy, no significant differences were noted in 5-year freedom from recurrence (70% v 71%, respectively; P = .467) or 5-year survival (54% v 60%, respectively; P = .258). Segmentectomy was not found to be an independent predictor of recurrence (hazard ratio, 1.11; 95% CI, 0.87 to 1.40) or overall survival (hazard ratio, 1.17; 95% CI, 0.89 to 1.52). CONCLUSION: In this large propensity-matched comparison, lobectomy was associated with modestly increased freedom from recurrence and overall survival, but the differences were not statistically significant. These results will need further validation by prospective, randomized trials (eg, Cancer and Leukemia Group B 140503 trial).

Investigates adaptive waveform selection schemes where selection is based on overall target tracking system performance. Optimal receiver assumptions allow the inclusion of transmitted waveform specification parameters in the tracking subsystem defining equations. The authors give explicit expressions for two one-step ahead optimization problems for a single target in white Gaussian noise when the tracker is a conventional Kalman filter. These problems may be solved to yield the most improvement possible in tracking performance for each new transmitted pulse. In cases where target motion is restricted to one dimension, closed-form solutions to the local (one step ahead) waveform optimization problem have been obtained. The optimal waveform selection algorithms in the paper may be included with conventional Kalman filtering equations to form an enhanced Kalman tracker. Simulation examples are presented to illustrate the potential of the waveform selection schemes for the optimal utilization of the capabilities of modern digital waveform generators, including multiple waveform classes. The extension of the basic waveform optimization scheme to more complex tracking scenarios is also discussed.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>

An investigation was undertaken to improve our understanding of low-Reynolds-number turbulent boundary layers flowing over a smooth flat surface in nominally zero pressure gradients. In practice, such flows generally occur in close proximity to a tripping device and, though it was known that the flows are affected by the actual low value of the Reynolds number, it was realized that they may also be affected by the type of tripping device used and variations in free-stream velocity for a given device. Consequently, the experimental programme was devised to investigate systematically the effects of each of these three factors independently. Three different types of device were chosen: a wire, distributed grit and cylindrical pins. Mean-flow, broadband-turbulence and spectral measurements were taken, mostly for values of R θ varying between about 715 and about 2810. It was found that the mean-flow and broadband-turbulence data showed variations with R θ , as expected. Spectra were plotted using scaling given by Perry, Henbest &amp; Chong (1986) and were compared with their models which were developed for high-Reynolds-number flows. For the turbulent wall region, spectra showed reasonably good agreement with their model. For the fully turbulent region, spectra did show some appreciable deviations from their model, owing to low-Reynolds-number effects. Mean-flow profiles, broadband-turbulence profiles and spectra were found to be affected very little by the type of device used for R θ ≈ 1020 and above, indicating an absence of dependence on flow history for this R θ range. These types of measurements were also compared at both R θ ≈ 1020 and R θ ≈ 2175 to see if they were dependent on how R θ was formed (i.e. the combination of velocity and momentum thickness used to determine R θ ). There were noticeable differences for R θ ≈ 1020, but these differences were only convincing for the pins, and there was a general overall improvement in agreement for R θ ≈ 2175.

The corrosion rate of AA(1) 7075 aluminum alloy in 0.1 M sodium chloride solution is decreased by the addition of 1000 ppm of FeCl2, cocl2, NiCl2, YCl3, LaCl3, NdCl3, PrCl3, or CeCl3. In each case, the protective cation is slowly incorporated into the oxide film which develops on the alloy surface during exposure to the solution. The most protective of the cation additions examined (i.e., Ce3+, La3+, Pr3+, Nd3+, and Ni2+) developed surface films which modified the susceptibility to corrosion by suppressing the kinetics of the oxygen reduction reaction at cathodic sites on the surface.

Savannas are the most fire-prone of the earth’s major biomes. The availability of various broad-scale satellite-derived fire mapping and regional datasets provides a framework with which to examine the seasonality, extent and implications of large fires with particular reference to biodiversity values in the tropical savannas of northern Australia. We document the significance of savanna fires in the fire-prone ‘Top End’ region of the Northern Territory, Australia, using 9 years (1997–2005) of National Oceanic and Atmospheric Administration (NOAA)-Advanced Very High Resolution Radiometer (AVHRR)-, Landsat Thematic Mapper (TM)- and Enhanced Thematic Mapper (ETM+)-derived fire mapping. Fire (patch) sizes from both AVHRR- and Landsat-scale mapping increased through the calendar year associated with progressive curing of grass and litter fuels. Fire frequency data at both satellite sensor scales indicate that regional fire regimes in higher rainfall regions are dominated by large (&amp;gt;1000 km2) fires occurring typically at short (~2–3 years) fire return intervals. In discussion, we consider the ecological implications of these patch size distributions on regional fire-sensitive biota. Collectively, assembled data illustrate that many northern Australian savanna flora, fauna and habitats embedded within the savanna matrix are vulnerable to extensive and frequent fires, especially longer-lived obligate seeder plant taxa and relatively immobile vertebrate fauna with small home ranges.

This article is one of ten reviews selected from the Annual Update in Intensive Care and Emergency Medicine 2019. Other selected articles can be found online at https://www.biomedcentral.com/collections/annualupdate2019 . Further information about the Annual Update in Intensive Care and Emergency Medicine is available from http://www.springer.com/series/8901 .

Wireless Sensor Networks (WSN) are vulnerable to various sensor faults and faulty measurements. This vulnerability hinders efficient and timely response in various WSN applications, such as healthcare. For example, faulty measurements can create false alarms which may require unnecessary intervention from healthcare personnel. Therefore, an approach to differentiate between real medical conditions and false alarms will improve remote patient monitoring systems and quality of healthcare service afforded by WSN. In this paper, a novel approach is proposed to detect sensor anomaly by analyzing collected physiological data from medical sensors. The objective of this method is to effectively distinguish false alarms from true alarms. It predicts a sensor value from historic values and compares it with the actual sensed value for a particular instance. The difference is compared against a threshold value, which is dynamically adjusted, to ascertain whether the sensor value is anomalous. The proposed approach has been applied to real healthcare datasets and compared with existing approaches. Experimental results demonstrate the effectiveness of the proposed system, providing high Detection Rate (DR) and low False Positive Rate (FPR).

The mechanism of the interaction of CO(2) laser radiation with fused silica is determined by the absorption depth of the radiation in the material. The extinction coefficient of a number of high-purity fused silica samples has been measured by the transmission method by fabricating samples approximately 30 microm in thickness. Results obtained agree with the latest reported values. In addition, samples were heated by an auxiliary CO(2)laser and the extinction coefficient determined as a function of temperature for six CO(2) laser lines. No significant difference in the extinction coefficient was observed for samples from different makers of the high-purity silica. Measurements were also conducted on a silica-rich glass Vycor and a significant difference was observed.

In this paper we investigate the benefit of augmenting data with synthetically created samples when training a machine learning classifier. Two approaches for creating additional training samples are data warping, which generates additional samples through transformations applied in the data-space, and synthetic over-sampling, which creates additional samples in feature-space. We experimentally evaluate the benefits of data augmentation for a convolutional backpropagation-trained neural network, a convolutional support vector machine and a convolutional extreme learning machine classifier, using the standard MNIST handwritten digit dataset. We found that while it is possible to perform generic augmentation in feature-space, if plausible transforms for the data are known then augmentation in data-space provides a greater benefit for improving performance and reducing overfitting.

Purpose One of the responses to criticisms of traditional forms of accounting reports for knowledge‐based firms has been the development of the balanced scorecard (BSC), a strategic performance measurement framework and methodology based on a family of performance measures. This paper aims to examine the issue of measuring performance in relation to a major Australian company, The Fosters Brewing Group, where a newly appointed CEO reversed a decline in performance by adopting, among other initiatives, the balanced scorecard approach to management. Design/methodology/approach The paper takes the form of a case study, applying the theoretical framework of the BSC to a declining business in order to achieve a turnaround. Findings The paper discusses how a newly appointed CEO of The Fosters Brewing Group reversed a decline in performance by adopting, among other initiatives, the balanced scorecard approach to management. Research limitations/implications The BSC is a practical framework to deal with the intangible nature of knowledge, while ensuring that such investments in knowledge and management align with and contribute to their strategic direction. Practical implications The paper provides an example of a company using the BSC to deal with the imperative of making investments in knowledge and management skills. Originality/value There is a growing body of literature on the limitations of traditional accounting statements that measure tangible, physical assets to capture the current and future value of knowledge. This paper illustrates a framework using the BSC to manage and measure the intangible nature of knowledge.

RivalryThe risk of conflict escalating from relatively minor events has increased in the South China Sea over the past two years with disputes now less open to negotiation or resolution.Originally, the disputes arose after World War II when the littoral statesChina and three countries of the Association of Southeast Asian Nations (ASEAN), Indonesia, Malaysia and the Philippines, as well as Vietnam which joined laterscrambled to occupy the islands there.Had the issue remained strictly a territorial one, it could have been resolved through Chinese efforts to reach out to ASEAN and forge stronger ties with the region.Around the 1990s, access to the sea's oil and gas reserves as well as fishing and ocean resources began to complicate the claims.As global energy demand has risen, claimants have devised plans to exploit the sea's hydrocarbon reserves with disputes not surprisingly ensuing, particularly between China and Vietnam.Nevertheless, these energy disputes need not result in conflict, as they have been and could continue to be managed through joint or multilateral development regimes, for which there are various precedents although none as complicated as the South China Sea.Now, however, the issue has gone beyond territorial claims and access to energy resources, as the South China Sea has become a focal point for U.S. -China rivalry in the Western Pacific.Since around 2010, the sea has started to become linked with wider strategic issues relating to China's naval

mouse models). BinJ/VIF-prME viruses thus represent a versatile, noninfectious (for vertebrate cells), high-yield technology for generating chimeric flavivirus particles with low biocontainment requirements.

Short pulses of acoustic energy at a carrier frequency of 950 Hz were beamed upwards from an array of loudspeakers. The energy which was backscattered from the random fluctuations of temperature within the turbulent regions of the lower 300 meters of the atmosphere was received on the same array and recorded on a facsimile receiver. The acoustic echoes were calibrated against temperature and wind data obtained from sensing elements fitted on a tower 75 meters high, 500 meters away from. the acoustic sounder. Sounding records, together with temperature and wind data, are presented for thermal plumes, breaking waves, and the formation and breakup of a radiation inversion. The usefulness of the acoustic sounding technique in continuously monitoring the intensity of small-scale temperature inhomogeneities in the lower atmosphere is emphasized. Future developments are outlined.

Organophosphorus (OP)-based nerve agents are extremely toxic and potent acetylcholinesterase inhibitors and recent attacks involving nerve agents highlight the need for fast detection and intervention. Fluorescence-based detection, where the sensing material undergoes a chemical reaction with the agent causing a measurable change in the luminescence, is one method for sensing and identifying nerve agents. Most studies use the simulants diethylchlorophosphate and di-iso-propylfluorophosphate to evaluate the performance of sensors due to their reduced toxicity relative to OP nerve agents. While detection of nerve agent simulants in solution is relatively widely reported, there are fewer reports on vapor detection using solid-state sensors. Herein, progress in organic semiconductor sensing materials developed for solid-state detection of OP-based nerve agent vapors is reviewed. The effect of acid impurities arising from the hydrolysis of simulants and nerve agents on the efficacy and selectivity of the reported sensing materials is also discussed. Indeed, in some cases it is unclear whether it is the simulant that is detected or the acid hydrolysis products. Finally, it is highlighted that while analyte diffusion into the sensing film is critical in the design of fast, responsive sensing systems, it is an area that is currently not well studied.

Protection is obligatory for the safety of people in certain occupations where they might be exposed to hazardous chemicals. This review provides an overview of chemical protective clothing, along with its necessity during industrial and military operations as well as in response to acts of terror. Moreover, chemical protective or barrier suits are illustrated and explained including their types, selection processes based on chemical hazards, working environments, and various materials available for the fabrication of effective barrier clothing. Additionally, this review elucidates current research gaps, while underscoring the challenges facing recently developed chemical protective clothing, by compiling relevant research onto a single platform. Besides, this review includes and delineates future trends in chemical protective outfits based on electro-spun nano-fibre technology involved in both detection and decomposition of poisonous chemical agents that come in contact with clothing material, and the integration of selectively permeable membrane technology to discriminately block hazardous chemicals.

High-rate and high-volumetric pseudocapacitance is generally considered very challenging to achieve. It is reported that a compact polyaniline–graphene hydrogel film can provide a combination of high-volumetric pseudocapacitance, excellent rate capability, and long cycle life. The pore connectivity, which ensures fast ion transport, and well-maintained nanostructured polyaniline in the compact electrode is the key.

The proposition that the demands of recruit training, including physical and psychological stresses, result in symptoms of overtraining was investigated during the 45-day Army Common Recruit Training course. Body mass, physical fitness, fasting blood measures of immune status, hormones (serum free testosterone/cortisol ratio), inflammation, and iron status were measured at baseline and after weeks 5 and 6. Psychological measures of mood and fatigue and general health were measured at the end of each week. Sleep diaries were completed each evening and morning. Evidence for overtraining symptoms of fatigue, sleep disturbance, immune suppression, reduced iron status, high rates of minor injuries, and hormonal changes was found. However, recruits were not pushed so hard that physical performance deteriorated greatly. Accumulated sleep deprivation might be a major contributor to the adverse hormonal changes. We conclude that there was some evidence of recruits being overtrained.